I recently bought a Radeon 5770 to add to my rig, which contains a 5870 and a 5850. However, when I added it to the motherboard and booted it up, Windows gave me a "uncorrectable hardware error" BSOD. My motherboard, the Intel D975XBXLKR, has 3 PCIe slots, so it should support 3 video cards...right? I do not have any of them connected in CrossFireX. Might the video card be malfunctioning, even though I just bought it? Or is this a limitation/problem of the motherboard (or Windows)?

"And what the enemy will see, they will see the flash of our cannons, and they will hear the ringing of our swords, and they will know what we can do! By the sweat of our brow and the strength of our backs and the courage in our hearts! Gentlemen, hoist the colors!"

I recently bought a Radeon 5770 to add to my rig, which contains a 5870 and a 5850. However, when I added it to the motherboard and booted it up, Windows gave me a "uncorrectable hardware error" BSOD. My motherboard, the Intel D975XBXLKR, has 3 PCIe slots, so it should support 3 video cards...right? I do not have any of them connected in CrossFireX. Might the video card be malfunctioning, even though I just bought it? Or is this a limitation/problem of the motherboard (or Windows)?

I ran 3 x 5850's on a D975XBXLKR and Ubuntu 10.10 without any issues. I didn't try it with Windows.